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5.2 Measurement Preparation
a) Collect the sample solution with a clean container and add the
solution to the 4/5 of the vial (about 18ml), see Diagram 7. Then
close the lid.
b) Before the measurement, users can slowly flip the sample vial a
few times and let it stand for 2 to 5 minutes to eliminate potential
air bubbles (see Diagram 8).
c) Clean off the surface of the vial to ensure it is dry, clean and free
of stains. Apply a small drop of silicone oil on the surface of the vial and wipe it off with a
micro-fiber cloth. Then wipe again with filter paper or high-quality tissue paper. See section
4.1(c) for details.
5.3 Measurement Mode
a) Normal Measurement Mode
Press , the screen will display the progress bar, and the measured value will be
displayed in 20 seconds. To take the next measurement, press again.
b) TruRead Measurement Mode
Long press and release the key when you hear a beep (see Diagram 9.1), then
enter TruRead mode. For example, if the number of continuous measurements is set to 20
times in parameter setting P2, a measured value will be displayed every 20 seconds.
Diagram 9.2 is the third measurement. Diagram 9.3 is the display interface at the end of
TruRead measurement. The average, maximum and minimum values will be displayed
along with a list of 20 measured values. TruRead measurement mode can be used for
observing the stabilizing process of turbidity, and can also be used for testing rapid-settling
solutions.
c) We Recommend using TruRead Measurement Mode
Turbidity measurement is a complex analytical measurement. Its error and stability are related
not only to the design of the instrument, but also many other factors such as solution uniformity
and precipitation, stray light, air bubble interference, sample vial contamination, optical errors,
operation technology and more. Therefore, using normal measurement mode will obviously
result in a larger error. For this reason, we recommend using TruRead measurement mode with
5 times continuous measurement for regular tests, that is, set the continuous measurement to 5
Diagram 7
Diagram 8
Diagram 9.3
Diagram 9.2
Diagram 9.1
